Door-lock.



No. 653,946. Patehted July l7, I900.

T. COLLETTI & J. COLASANTI.

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(Application filed May 19, 1900.)

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No. 653,946. Patented July l7, I900. T. GULLETTI & .1. COLASANTI.

000B LOCK.

(Appliution filed m 19, 1900.)

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WITNESSES: A jlmu Km I Mrs NORRIS Firms co. PHora-u'mu. wunmm'on u c No.653,946. Patented-Jul l7, I900. T. COLLETTI & J. COLASANTI.

DOOR LOCK.

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UNITED STAT S PATENT OFFICE.

THOMAS COLLETTI AND JOHN OOLASANTI, OF NEW YORK, N, Y.

LOCK.

SPECIFICATION forming part of Letters Patent No. 653,946, dated July 17,1900.

Application filed May 19, 1900.

To all whom it may concern.-

Be it known that we, THOMAS COLLETTI and JOHN OOLASANTI, citizens ofItaly, and residents of the city of New York,borough of Manhattan, andState of New York, have invented certain new and useful Improvements inDoor-Locks, of which the following is a specification.

Our invention relates to door-locks of that class provided with slidingbolts; and the objects of the invention are to obtain a lock whichcannot be unlocked except bya special operation of the true keyand whichis simple, considering the security obtained by the same.

Ourinvention consists of a lock which comprises a case, a fixedguide-stud, an edgewisemovable longitudinally-slotted bolt, guided onsaid stud and provided with means for interlocking with said stud, aspring acting edgewise on said bolt to insure its interlocking with saidstud, and a floating push-piece mounted on the bolt and adapted by theproper operation of the key to shift and release the bolt from the studand to finally retract the bolt, as will be hereinafter fully describedin detail and then specified in the claim.

In the accompanying drawings, Figure 1 is a front elevation of our lockin open position with the face-plate removed. Fig. 2 is an enlargedtransverse section on line 2 2, Fig. 1. Figs. 3, 4, and 5 are elevationsof the lock, showing the three phases or positions of the look fromunlocked to locked position and the corresponding positions of the key;and Figs. 6, 7, and 8 are elevations of the lock, showing the threephases or positions of the look from locked to partially-unlockedposition and the corresponding positions of the key, the fourth orunlocked position being clearly shown in Fig. 1. The. tumblers areomitted in Figs. 3 to 8 for clearness.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A indicates the lock-case, and 13 thestrike-plate or keeper with which the bolt 0 of the lock engages. Thebolt 0 is preferably reduced at its inner end to form a shank, which isprovided with 'posite side of the cut-away f to the shoulder alongitudinal slot 0', one wall of which is Serial No. 17,267. o model.)

provided with a notch or recess 0 at the rear end of the slot.

D indicates a guide-stud on the case A entering the slot 0 and providedat one side with a teat or projection d, which is adapted to take intosaid notch C in the bolt when the bolt is projected to its fullestextent, as shown in Fig. 5. y

D indicates a fiat spring suitably secured to the case A at one end,as'by solder, and which at its free end bears upon that edge of the boltwhich is adjacent to the notch 0 so as to move the bolt 'edgewise andcause the notch to be engaged by saidteat cl when the notch and teat areopposite. slight play edgewise, as is evident from the drawings.

E indicates the tumblers,which are pivoted to the lock-case A at e andare subjected to the action of flat springs E,which are secured to thetumblers and at their free ends bear against the lock-case. Saidtumblers E are provided with longitudinal slots 6, on opposite sides ofwhich are recesses 6 in which recesses a side lug e on the bolt iscaused to en gage by means of the springs E. There are three recesses eat each side of the slot 6 of each tumbler, corresponding to the threepositions of the form of bolt shown. The bolt is preferably providedwith a should er or abut mentfat one side of a recess f in the bolt andanother shoulder or abutment f at the other side of said recess, withwhich shoulders or abutments the key F may engage for operating thetumblers and bolt by two turns. The shoulder or abutment f is formed bya cut-awayf at one corner of the rear end of the bolt.

Pivoted to the rear end of the bolt 0 at g is a finger or contact G,which is termed a floating push-piece, for reasons apparent hereinafter.The pivoted end of the push piece G is fiatted at g, so as to afiord abearing-place for the free end of a flat spring h, which is secured tothe bolt, while the free end of the push-piece is formed with a notchSaid push-piece G is locatedvon the opor abutment f.

To operate the bolt to lock a door, the key F is inserted into thekeyhole and turned in The bolt has a gaged by the lug e the direction ofthe arrow, Fig. 3, causing the bit of the key to operate the tumblers Ein the well-known Way and to engage with the shoulder f of the bolt 0,the key being turned until the bolt is shot half-way and the parts beingthereby brought to the position shown in Fig. 4. Right here we desire itfully understood that the position just assumedmay be the normal lockingposition, as our invention is not limited to the means for obtaining twoshifts nor to two shifts of the bolt, as is shown in the drawings. Itwill be evident that the second shift (now to be described) isunnecessary; but it is preferable for securitys sake. The bolt havingbeen brought to the position shown in Fig. 4, the bit of the key isdisengaged from the shoulder f by the continuous turning of the key, thekey being turned sufficiently until its bit strikes against theshoulderf, so as to push the bolt out to full-shot position, (shown inFig. 5,) in which position the teat or projection don the guidestud D iscaused to be engaged in the notch C in the bolt through the action ofspring D, which exerts a slight pressure on the bolt. In this positionthe bolt is held positively locked against longitudinal movement by theen gagement of teat d in notch 0 in addition to the locking obtained inthe usual manner by the tumblers E, the notches e of which are en- Thesaid lug e successively engages in the notches e in the three positionsof the bolt described. It is evident that if the tumblers are operatedin the proper way by picking it will be practically impossible toretract the bolt, because of its being positively locked to the case Ain the manner stated and because its retraction can be accomplished onlythrough the intervention of the floating push-piece G.

Supposing an attempt is made by a thief or unauthorized person tooperate the lock, he

will insert the key in the lock, and, although he may operate thetumblers properly, he cannot retract the bolt, because he mustknow howto connect the key with the bolt to that end. He will simply sweep thekey back and forth, as shown by the dotted line, Fig. 5, withoutreaching the desired end. To retract the bolt, one must know that thekey has to be given a slow turn to the left (see the arrow, Fig. 6)until the click caused by the engagement of the notched end of thefloating push-piece G is heard, this'being a signal that the key is inproper position to begin with. If the operator cannot hear the click, hecan feel that the said push-piece has been snapped into engagement withthe key by the spring h. The push-pi ece is by this operation rocked onits pivot g, and the parts assume the position shown in Fig. 6, so thaton turning the key back in the direction shown by the arrow in Fig. 7 athrust is imparted to the bolt through the push-piece and the bolt isreleased from engagement with the teat d, so that on'continuing to turnthe key in the direction indicated the bolt is retracted halfway intothe position shown in Fig. 8 and the key is released from the saidpush-piece, which then assumes the position shown in this latter figure.Afurther turn is given to the key in the direction indicated by thearrow, Fig. 8, until the bit of the key abuts against the shoulder f,the key being turned until the bolt is fully retracted into the positionshown in Figs. 1 and 3.

By the combination of the described parts with a tumbler-lock a lock isobtained which is very safe and secure against unlocking except by aperson with the true operating-key and who is acquainted with thepeculiarities of the lock itself.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

In a lock, the combination of the case, a fixed guide-stud, anedgewise-movable longitudinally-siotted bolt guided on said stud andprovided with means for interlocking with said stud, a spring actingedgewise on said bolt to insure its interlocking with said stud, and afloating push-piece pivoted on the bolt and adapted, by the properoperation of the key, to shift and release the bolt from the stud and tofinally retract the bolt, substantially as set forth.

In testimony that we claim the foregoing as our invention we have signedour names in presence of two subscribing Witnesses.

THOMAS OOLLETTI. JOHN COLASANTI.

\Vitnesses:

PAUL GOEPEL, JOSEPH H. NILEs.

